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wzp-relay: - RelayPipeline: ingest → FEC decode → jitter buffer → FEC encode → send - SessionManager: tracks active calls, idle expiry - RelayConfig: TOML-based configuration - Binary: accepts QUIC connections, receives media packets wzp-client: - CallEncoder: mic PCM → Opus encode → FEC → MediaPackets - CallDecoder: MediaPackets → FEC decode → jitter → Opus decode → PCM - CLI binary: connects to relay, sends test silence frames 99 tests passing across all 7 crates. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>